CN203239329U - Layered Water Injection High Pressure Seal Inspection Instrument - Google Patents

Abstract

The utility model discloses a high-pressure seal checking instrument for layered water injection, which comprises a retractable supporting mechanism, a sealing mechanism, a buffer mechanism, a butt joint controller, a piston pump, a first sensor group, a driving motor, a second sensor group, a control mechanism and a cable joint, wherein the supporting mechanism, the sealing mechanism, the buffer mechanism, the butt joint controller and the piston pump are sequentially connected from bottom to top and can be actively expanded and contracted; the control mechanism comprises a supporting plate and a circuit board, and the circuit board is sequentially connected with the second sensor group, the driving motor, the first sensor group, the piston pump and the butt joint controller; the second sensor group comprises a pressure sensor and a sensor seat, and the pressure sensor is arranged in the sensor seat. The utility model discloses can once go into the well and realize that whole packers test the operation of sealing, can be in the encapsulated situation of ground real-time supervision layering packer moreover, reducible operating personnel work load improves work efficiency.

Description

Layered Water Injection High Pressure Seal Inspection Instrument

technical field

The utility model relates to the field of high-pressure layered water injection, in particular to a layered water injection high-pressure sealing tester.

Background technique

As we all know, the packer is an important downhole tool for water injection wells, and the sealing state of the packer directly affects the water injection effect. At present, steel wire seal inspection tools are usually used to inspect the sealing state of the packer. The existing steel wire sealing inspection tool relies on gravity to compress the cup to realize sealing, and the steel wire lifting tool realizes unsealing. However, under high-pressure water injection conditions (generally water injection pressure above 40MPa is called high-pressure water injection), the sealing force is large, and it is easy to fail to seal or pull out the steel wire, and it is impossible to monitor the sealing state. The existing steel wire seal inspection instrument is to be lowered into the storage type dual-channel pressure gauge to realize the seal inspection test. After the packers in each interval are tested, they must be brought to the ground for data playback to judge the seal inspection. Therefore, the existing The steel wire seal inspection instrument needs to pull out the seal inspection plug from the underground and play it back on the ground to judge the sealing state of the packer. It cannot monitor the sealing state of the layered packer in real time, which is easy to cause rework and a large workload.

Utility model content

The purpose of this utility model is to provide a layered water injection high-pressure seal tester which can monitor the sealing condition of the layered packer in real time, which can reduce the workload of operators and improve work efficiency. The layered water injection high-pressure sealer is mainly suitable for Packer seal inspection of bridge-type eccentric layered water injection string.

In order to achieve the above purpose, the utility model provides a layered water injection high-pressure seal tester, which is lowered into the water injection well by cables, including a retractable support mechanism connected in sequence from bottom to top, a sealing mechanism that can actively expand and contract, The buffer mechanism, the docking controller used to control the retraction and retraction of the support mechanism, the piston pump that drives the expansion of the sealing mechanism, the first sensor group used to sense position information, the drive motor used to drive the transmission shaft to rotate, and the pressure gauge used to measure the pressure. The second sensor group, the control mechanism for transmitting control signals and detection data signals, the cable joints and winch cables for connecting cables; the control mechanism includes a support plate and a circuit board, and the circuit board is arranged on the On the support plate, the circuit board is sequentially connected with the second sensor group, the drive motor, the first sensor group, the piston pump, and the docking controller; the second sensor group includes a pressure sensor and a sensor seat, and the The pressure sensor is arranged in the sensor seat.

The layered water injection high-pressure seal tester described above, wherein the sealing mechanism is a skin bag, and the skin bag is the double skin bag structure.

The layered water injection high-pressure seal tester described above, wherein the sensor seat is cylindrical, and at least three mounting holes are opened on the sensor seat parallel to the axial direction, and the mounting holes are arranged along the axis of the sensor seat. The cross-sections of the mounting holes are evenly arranged in the circumferential direction, and the lamination sensors for measuring the lamination, the bag pressure sensors for measuring the bladder pressure and the oil pressure sensors for measuring the oil pressure are respectively arranged in the installation holes.

The layered water injection high-pressure seal tester described above, wherein the cable joint includes an upper joint, an upper retainer, a mold spring seat, and a junction box connected in sequence, and an arc-shaped Righting shrapnel.

In the layered water injection high-pressure seal inspection instrument described above, the first sensor group includes an angle sensor arranged on the shaft coupling of the driving motor and a position sensor arranged on the motor base of the driving motor.

The layered water injection high-pressure seal tester described above, wherein the piston pump includes a transmission gear, a rotating shaft and a pressurizing piston connected in sequence, and a hydraulic chamber is provided between the rotating shaft and the pressurizing piston, so The hydraulic chamber communicates with the sealing mechanism, the transmission gear drives the rotating shaft to rotate, and the rotating shaft drives the pressurizing piston to squeeze the hydraulic chamber.

The layered water injection high-pressure seal tester described above, wherein the docking controller includes a first transmission shaft, a clutch, and a second transmission shaft connected in sequence, the first transmission shaft is connected to the drive motor, and the The second transmission shaft is connected with the support mechanism.

The layered water injection high-pressure seal inspection instrument described above, wherein the buffer mechanism is a spring arranged on the outer periphery of the sealing mechanism.

The layered water injection high-pressure seal tester described above, wherein a weight bar is connected to the lower end of the support mechanism.

Compared with the prior art, the utility model has the following characteristics and advantages:

1. The utility model carries the seal inspection instrument through the cable and enters the water distributor at the lowest level. The ground controls the double leather bag to seal actively, and the ground controls the oil pipe pressure by "switching on". The ground directly obtains the oil pipe pressure, formation pressure and The bladder pressure data reflects the seal inspection results in real time, completes all seal inspection operations in one trip, and monitors the sealing status of the layered packer in real time, which can reduce the workload of operators and improve work efficiency.

2. The utility model is mainly applicable to the seal inspection of the packer of the bridge-type eccentric layered water injection string widely used at present.

3. After the test of the utility model is completed, the ground directly controls the double leather bag of the sealing inspection instrument through the cable to actively retract and unsealing, which ensures reliable unsealing, avoids the risk of breaking the steel wire under high pressure, and has strong adaptability in a high-pressure environment.

Description of drawings

The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes and proportional dimensions of the components in the drawings are only schematic and are used to help the understanding of the present utility model, and do not specifically limit the shapes and proportional dimensions of the various components of the present utility model. Under the teaching of the utility model, those skilled in the art can choose various possible shapes and proportional dimensions according to specific conditions to implement the utility model.

Fig. 1 is the overall structure schematic diagram of the utility model layered water injection high-pressure sealing tester;

Fig. 2 is the structural representation of the cable connector of the present utility model;

Fig. 3 is the structural representation of the control mechanism of the present utility model;

Fig. 4 is a schematic diagram of the axial section structure of the second sensor group of the present invention;

Fig. 5 is a schematic diagram of a transverse cross-sectional structure of a second sensor group of the present invention;

Fig. 6 is the structural representation of the first sensor group of the present utility model;

Fig. 7 is the structural representation of the piston pump of the present utility model;

Fig. 8 is a structural schematic diagram of the docking controller of the present invention;

Fig. 9 is a structural schematic diagram of the combination of the supporting mechanism, the bladder, the sealing mechanism, the buffer mechanism and the counterweight rod of the present invention.

Explanation of reference signs:

1-cable connector; 11-upper connector; 12-upper retainer; 13-mold spring seat; 14-junction box; 15-righting shrapnel;

2-control mechanism; 21-support plate; 22-circuit board; 23-fixing screw; 3-second sensor group; 31-pressure sensor; 32-sensor seat; 33-installation hole; Bladder pressure sensor; 36-oil pressure sensor; 4-drive motor;

5-first sensor group; 51-angle sensor; 52-position sensor; 6-piston pump; 61-transmission gear; 62-rotary shaft; 63-pressurized piston; 64-hydraulic chamber; - first transmission shaft; second transmission shaft 72; 73 - clutch;

8-buffer mechanism; 9-sealing mechanism; 10-support mechanism; 100-skin bag; 101-counterweight rod.

Detailed ways

The details of the utility model can be understood more clearly in combination with the accompanying drawings and the description of the specific implementation of the utility model. However, the specific implementations of the utility model described here are only for the purpose of explaining the utility model, and cannot be construed as limiting the utility model in any way. Under the teaching of the present utility model, any possible deformation based on the present utility model can be conceived by a skilled person, and these should be regarded as belonging to the scope of the present utility model.

Please refer to Fig. 1 to Fig. 8, Fig. 1 is a schematic diagram of the overall structure of the utility model layered water injection high-pressure sealing inspection instrument; Fig. 2 is a schematic diagram of the structure of the cable joint of the utility model; Fig. 3 is a control mechanism of the utility model Fig. 4 is a schematic structural view of the second sensor group of the present utility model; Fig. 5 is a schematic structural view of the transverse section of the second sensor group of the present utility model; Fig. 6 is a schematic structural view of the first sensor group of the present utility model ; Fig. 7 is a schematic diagram of the structure of the piston pump of the present invention; Fig. 8 is a schematic diagram of the structure of the docking controller of the present invention; A schematic diagram of the combined structure.

As shown in Fig. 1, Fig. 3, Fig. 4 and Fig. 5, the utility model proposes a layered water injection high-pressure seal inspection instrument, which uses cables to be lowered into the water injection well, and includes retractable support mechanisms connected sequentially from bottom to top 10. It is used to support the seal inspection instrument after docking with the downhole water distributor; it can actively expand and contract the sealing mechanism 9, the sealing mechanism 9 is a leather bag 100, and the leather bag 100 adopts a double-bag structure to seal the measurement layer; the buffer mechanism 8. Make the instrument play a buffer role before and after docking, and protect the instrument from excessive impact force; docking controller for controlling the retraction and retraction of the support mechanism 7, piston pump for controlling the contraction and expansion of the skin bag 6, for sensing the position The first sensor group 5 for information, the driving motor 4 for driving the transmission shaft to rotate, the second sensor group 3 for measuring pressure, the control mechanism 2 for transmitting control signals and detecting data signals, and for connecting cables cable joint 1 and winch cable; as shown in Figure 3, the control mechanism 2 includes a support plate 21 and a circuit board 22, and the circuit board 22 is arranged on the support plate 21 by a fixing screw 23. In the present utility model, the two circuit boards 22 It is fixed on both sides of the support plate 21. The circuit board 22 is sequentially connected with the second sensor group 3, the driving motor 4, the first sensor group 5, the piston pump 6, and the docking controller 7, and the ground device transmits the control signal to the driving motor 4, the piston through the circuit board 22 through the cable. The pump 6 is connected to the controller 7 to realize corresponding actions, and the data signals of the second sensor group 3 and the first sensor group 5 are transmitted to the ground device through the circuit board 22 and cables for analysis and judgment. The second sensor group 3 includes a pressure sensor 31 and a sensor seat 32 , and the pressure sensor 31 is arranged in the sensor seat 32 . In this way, the pressure sensor 31 can transmit the measured downhole pressure data to the surface in real time, and reflect the seal inspection results in real time, and can check the seals of the packers in each layer one by one, and complete the inspection of all layers in the downhole at one time. Seal homework.

As shown in Figures 4 and 5, the sensor seat 32 is cylindrical, and three installation holes 33 are provided on the sensor seat 32 parallel to the axial direction, and the three installation holes 33 are evenly arranged along the cross-section circumferential direction of the sensor seat 32, A lamination sensor 34 , a bladder pressure sensor 35 and an oil pressure sensor 36 are respectively provided in the installation hole 33 . Among them, the sensing part of the lamination sensor 34 communicates with the formation for measuring the formation pressure; the sensing part of the pressure sensor 35 communicates with the bladder for measuring the bladder pressure; the sensing part of the oil pressure sensor 36 communicates with the oil pipe for measuring the pressure of the oil pressure inside the tube. The above-mentioned pressure sensor 31 is a semiconductor piezoresistance diffusion pressure sensor, which forms a semiconductor deformation pressure on the surface of the sheet, and the sheet is deformed by the pressure to produce a piezoresistance effect, so that the change of impedance is converted into an electrical signal. In addition, according to actual needs, four, five or more installation holes 33 can be opened in the sensor seat 32 to install more pressure sensors 31, and of course temperature sensors or other sensors required for measurement can also be installed. The utility model does not limit this.

As shown in Figure 2, the cable joint 1 includes an upper joint 11, an upper retaining sleeve 12, a mold spring seat 13, a junction box 14, etc. connected in sequence, and the cable is installed in the junction box 14, and the cable joint 1 is used as one end of the entire cable and the For the cable terminal joint when the equipment is connected, an arc-shaped straightening shrapnel 15 is provided outside the mold spring seat 13. When the instrument is working underground, the righting shrapnel 15 of the cable joint 1 can also play a role of righting.

As shown in Figure 6, the first sensor group 5 includes an angle sensor 51 and a position sensor 52, the angle sensor 51 is arranged on the shaft coupling of the drive motor 4, senses the number of rotations of the main shaft of the support mechanism 10, and then transmits the data to the control The controller controls the rotation of the main shaft to achieve the function of driving the support mechanism 10 to retract and dock; the position sensor 52 is arranged on the motor seat of the drive motor 4, and the position sensor 52 is mainly used to control the pressure of the leather bag when the instrument is set. The starting and ending positions of , are used to assist in judging the sealing state of the skin bag.

As shown in Figure 7, the piston pump 6 includes a transmission gear 61, a rotating shaft 62 and a pressurizing piston 63 connected in sequence, and a hydraulic chamber 64 is provided between the rotating shaft 62 and the pressurizing piston 63, and the hydraulic chamber 64 is connected to the bladder 100 The transmission gear 61 drives the rotating shaft 62 to rotate, and the rotating shaft 62 drives the pressurizing piston 63 to squeeze the hydraulic chamber 64, press the liquid in the hydraulic chamber 64 into the bladder 100, and expand the bladder 100 to achieve the sealing effect.

As shown in Figure 8, the docking controller 7 includes a first transmission shaft 71, a clutch 73 and a second transmission shaft 72 connected in sequence, the first transmission shaft 71 is connected with the driving motor 4, and the second transmission shaft 72 is connected with the support mechanism 10 connected. When in use, the drive motor 4 drives the first transmission shaft 71 to rotate, the first transmission shaft 71 drives the second transmission shaft 72 to rotate through the clutch 73, and the rotation of the second transmission shaft 72 controls the retraction and docking of the support mechanism 10 . After the supporting mechanism 10 is docked, the clutch 73 is disengaged, and the driving motor 4 drives the first transmission shaft 71 to continue to rotate to control the action of the leather bag.

As shown in FIG. 9 , the buffer mechanism 8 is a spring arranged on the outer periphery of the leather bag 100 , and the spring mainly plays a buffer role before and after the docking of the instrument, so as to protect the instrument from excessive impact force. The skin bag 100 has a double skin bag structure, which is suitable for active sealing and has better sealing effect. The sealing mechanism 9 mainly presses the skin bag 100, and the expansion of the skin bag 100 closely contacts with the inner wall of the downhole water distributor to achieve the sealing effect, and then performs the packer sealing test measurement. The supporting mechanism 10 mainly supports the instrument after docking with the downhole water distributor, so as to realize the positioning between the instrument and the water distributor. Preferably, a counterweight rod 101 is connected to the lower end of the support mechanism 10, and the counterweight rod 101 mainly increases the weight of the instrument so that the instrument can be lowered downhole smoothly.

The layered water injection high-pressure sealing tester proposed by the utility model is suitable for the packer seal inspection work of bridge-type eccentric layered water injection strings widely used at present. The seal inspection instrument directly controls the active sealing and unsealing of the double leather bag through the ground cable, so as to ensure that the instrument can be reliably sealed and unsealed in a high-pressure environment. At the same time, the data of tubing pressure, formation pressure and bladder pressure can be directly obtained on the surface, and the seal inspection results can be reflected in real time, and all seal inspection operations can be completed in one trip to avoid rework. The utility model of the utility model of the layered water injection high pressure seal tester solves the problem of sealing test of the packer of the high pressure water injection well which has been troubled in the oil field.

The working process of the present utility model is as follows:

The utility model layered water injection high-pressure seal inspection instrument is lowered into the high-pressure water injection well by the cable winch linked by the measurement and adjustment linkage. When it reaches the water distributor on the bottom layer, the ground control support mechanism 10 is opened. When it reaches the position of the bridge-type eccentric water distributor, the ground Control the positioning of the support arm 10 and sit on the steps, and then the ground controls the bladder 100 to press and seal through the piston pump 6, and the data is fed back to the ground through the bladder pressure, lamination, and oil pressure sensors, and the ground judges the sealing device 9 based on the bladder pressure data. Is it sealed. The ground controls the “switch on” of the tubing, and the ground observes whether the formation pressure changes with the pressure of the tubing, and then judges whether the packer is sealed. After the test of this layer is completed, the ground control bladder is depressurized and unsealed, and the ground control support mechanism 10 is retracted. The seal inspection instrument is lowered or lifted to another interval to be tested for testing, and the test of each interval of the whole well is completed in sequence. The testing process can be carried out sequentially from bottom to top or from top to bottom, realizing one-time downhole and complete all sealing inspections.

For the detailed explanations of the above-mentioned embodiments, the purpose is only to explain the utility model so as to better understand the utility model, but these descriptions cannot be interpreted as a limitation of the utility model for any reason, especially, The various features described in different implementations can also be combined arbitrarily with each other to form other implementations. Unless there is an explicit description to the contrary, these features should be understood as being applicable to any implementation, and not limited to all of them. described implementation.

Claims (9)

1. seperated layer water injection high pressure seal-checking instrument, adopt cable to be lowered in the water injection well, it is characterized in that, described seperated layer water injection high pressure seal-checking instrument comprises the supporting mechanism of the energy folding and unfolding that links to each other successively from the bottom to top, energy is the sealing mechanism of enlargement and contraction initiatively, buffer gear, the docking controller that is used for the folding and unfolding of control supporting mechanism, drive the piston pump of sealing mechanism enlargement and contraction, the first sensor group that is used for sensed position information, be used for driving the drive motors that power transmission shaft rotates, the the second sensor group that is used for gaging pressure, the controlling organization that is used for transmission of control signals and data detection signal, and the cable connector and the winch cable that are used for connecting cable; Described controlling organization comprises gripper shoe and wiring board, and described wiring board is arranged on the described gripper shoe by hold-down screw, and described wiring board is connected with described the second sensor group, drive motors, first sensor group, piston pump, docking controller successively; Described the second sensor group comprises pressure sensor and sensor holder, and described pressure sensor is located in the described sensor holder.

2. seperated layer water injection high pressure seal-checking instrument as claimed in claim 1 is characterized in that, described sealing mechanism is leather bag, and described leather bag is two leather bag structures.

3. seperated layer water injection high pressure seal-checking instrument as claimed in claim 2, it is characterized in that, described sensor holder is cylindric, on described sensor holder, axially offer at least three installing holes along being parallel to, described installing hole is circumferentially evenly laid along the cross section of described sensor holder, the oil pressure sensor that is respectively equipped with for the lamination sensor of measuring lamination in described installing hole, is used for measuring the bag pressure sensor of leather bag pressure and is used for measuring oil pressure.

4. seperated layer water injection high pressure seal-checking instrument as claimed in claim 1 is characterized in that, described cable connector comprises top connection, upper interstage sleeve, die springs seat, the junction box that connects successively, is provided with the righting shell fragment that is arc bending shape in described die springs seat outside.

5. seperated layer water injection high pressure seal-checking instrument as claimed in claim 1 is characterized in that, described first sensor group comprises the angular transducer on the shaft coupling that is arranged at described drive motors and is arranged on position sensor on the motor cabinet of described drive motors.

6. seperated layer water injection high pressure seal-checking instrument as claimed in claim 1, it is characterized in that, described piston pump comprises successively connection for transmission gear, axis of rotation and pressurizing piston, between described axis of rotation and described pressurizing piston, be provided with hydraulic cavities, described hydraulic cavities is connected with described sealing mechanism, described travelling gear drives the rotation of described axis of rotation, and described axis of rotation drives described pressurizing piston and pushes described hydraulic cavities.

7. such as each described seperated layer water injection high pressure seal-checking instrument in the claim 1 to 6, it is characterized in that, described docking controller comprises the first power transmission shaft, clutch and the second driving shaft that connects successively, described the first power transmission shaft is connected with described drive motors, and described second driving shaft is connected with described supporting mechanism.

8. seperated layer water injection high pressure seal-checking instrument as claimed in claim 1 is characterized in that, described buffer gear is the spring that is arranged on described sealing mechanism periphery.

9. seperated layer water injection high pressure seal-checking instrument as claimed in claim 1 is characterized in that, is connected with weight linear meter in the lower end of described supporting mechanism.

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